EP2236965A2 - Procédé de séchage de film polymère et procédé de fabrication d'un film polymère barrière à la vapeur d'eau - Google Patents

Procédé de séchage de film polymère et procédé de fabrication d'un film polymère barrière à la vapeur d'eau Download PDF

Info

Publication number
EP2236965A2
EP2236965A2 EP10158387A EP10158387A EP2236965A2 EP 2236965 A2 EP2236965 A2 EP 2236965A2 EP 10158387 A EP10158387 A EP 10158387A EP 10158387 A EP10158387 A EP 10158387A EP 2236965 A2 EP2236965 A2 EP 2236965A2
Authority
EP
European Patent Office
Prior art keywords
drying
compound
steam
polymeric
functional group
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP10158387A
Other languages
German (de)
English (en)
Other versions
EP2236965A3 (fr
Inventor
Keio Okano
Takao Taguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujifilm Corp
Original Assignee
Fujifilm Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujifilm Corp filed Critical Fujifilm Corp
Publication of EP2236965A2 publication Critical patent/EP2236965A2/fr
Publication of EP2236965A3 publication Critical patent/EP2236965A3/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B3/00—Drying solid materials or objects by processes involving the application of heat
    • F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/0427—Coating with only one layer of a composition containing a polymer binder
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/048—Forming gas barrier coatings
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/056—Forming hydrophilic coatings
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/08—Heat treatment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
    • F26B13/10—Arrangements for feeding, heating or supporting materials; Controlling movement, tension or position of materials
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2425/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
    • C08J2425/02—Homopolymers or copolymers of hydrocarbons
    • C08J2425/04—Homopolymers or copolymers of styrene
    • C08J2425/06—Polystyrene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2427/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C08J2427/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2427/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08J2427/06—Homopolymers or copolymers of vinyl chloride
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2427/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C08J2427/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2427/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08J2427/08—Homopolymers or copolymers of vinylidene chloride
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2427/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C08J2427/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2427/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C08J2427/18—Homopolymers or copolymers of tetrafluoroethylene

Definitions

  • the present invention relates to a method of drying polymeric film and a method for producing a polymeric water-vapor barrier film. More particularly, it relates to a method of drying polymeric film which is capable of quickly removing the solvent from a polymeric film having water-vapor barrier properties, and a method of producing a polymeric water-vapor barrier film.
  • Chlorine resins, fluorine resins, their copolymers and other like resins are known to have excellent vapor barrier properties, and many of them have been utilized as agricultural films and food wrap films. Also, the films made from these resins excel in flexibility, strength, electrical insulation and flame retardancy and are widely used as coating binders, base films, parts of electric devices, building materials and such.
  • a drying method using steam is particularly useful as this method, compared with the ordinary hot air drying system, is capable of quickly removing unnecessary solvent and is also highly rated in terms of safety.
  • the present invention has been offered in view of these circumstances, and it is the object of the present invention to provide a method of drying polymeric film which is capable of performing quicker drying even for polymeric films with high water vapor barrier properties, and a method of producing a polymeric water-vapor barrier film.
  • a method of drying polymeric film comprising a hot air drying step in which the polymeric film is dried to the dry point by hot air, and a steam drying step in which drying is performed with steam.
  • the coating solution containing a polymeric compound having water vapor barrier properties As a compound having a hydrophilic functional group is added to the coating solution containing a polymeric compound having water vapor barrier properties, it is possible to let steam permeate inside the polymeric film even when drying is carried out with steam. Accordingly, this enables quick drying of the polymeric film inclusive of its inside, that is, a rise of drying speed.
  • the steam according to the first aspect is overheated steam having a temperature of 100°C or higher.
  • the second aspect it is possible to conduct drying at high efficiency because of use of overheated steam having a temperature of 100°C or above.
  • the compound having a hydrophilic functional group according to the first or second aspect is added in 10 to 40 parts by mass per 100 parts by mass of the polymeric compound.
  • the third aspect as it is possible to increase steam permeability of the polymeric film by defining the content of the compound having a hydrophilic functional group in the range shown above, drying can be accelerated. If the content of the compound having a hydrophilic functional group is below the above range, no noticeable effect of improving steam permeability of the polymeric film is derived. Also, no extra effect can be expected when the compound is contained in an amount in excess of the above range.
  • the polymeric compound according to any one of aspects 1 to 3 has a moisture permeability of 2.6 to 98 g (STP)cm/(cm 2 ⁇ s ⁇ cmHg).
  • the fourth aspect by defining moisture permeability of the polymeric compound in the range shown above, particularly with addition of a compound having a hydrophilic functional group, it is possible to enhance the effect of steam drying and to accelerate drying.
  • the temperature of the steam is lower than the sublimation temperature of the compound having a hydrophilic functional group.
  • the temperature of the steam is set lower than the sublimation temperature of the compound having a hydrophilic functional group, it is possible to perform drying without reducing steam permeability of the film by drying. Accordingly, this allows efficient steam drying.
  • the compound having a hydrophilic functional group according to any one of aspects 1 to 5 is at least one selected from adipic acid, fumaric acid, succinic acid, acetylsalicylic acid and benzoic acid.
  • the sixth aspect describes the compounds having a hydrophilic functional group that can be used favorably in the present invention.
  • Use of the above-mentioned compounds having a hydrophilic functional group makes it possible to afford hydrophilicity to the polymeric films, to increase steam permeability, to enhance the effect of steam drying, and to accomplish quick drying.
  • the polymeric compound according to any one of aspects 1 to 6 is at least one compound selected from polystyrene, polyvinyl chloride, polyvinylidene chloride and polytetrafluoroethylene.
  • the polymeric compounds that can be used especially favorably in the present invention.
  • the steam drying step according to any one of aspects 1 to 7 is carried out in a drying chamber and, with a steam atmosphere being created in the drying chamber, the support having a polymeric film formed thereon is passed through the drying chamber for drying.
  • drying can be performed efficiently as it is possible to start drying immediately after the support is carried into the drying chamber having a steam atmosphere formed in its inside.
  • the organic solvent according to any one of aspects 1 to 8 has a boiling point of 150°C or higher.
  • drying method of the present invention as it is possible to let steam permeate inside the polymeric film, drying can be performed efficiently even when using an organic solvent with a high boiling point. Therefore, drying can be performed effectively particularly when using an organic solvent such as mentioned above.
  • a heating step is incorporated wherein heating is carried out at a temperature not lower than the sublimation temperature of the compound having a hydrophilic functional group.
  • the tenth aspect as heating is conducted at a temperature not lower than the sublimation temperature of the compound having a hydrophilic functional group after quick removal of the organic solvent in the polymeric film in the steam drying step, it is possible to sublimate the compound to recover the water vapor barrier properties to the polymeric film.
  • a method of producing a polymeric water-vapor barrier film which comprises a polymeric film forming step in which a coating solution containing a polymeric compound having water vapor barrier properties, at least one organic solvent and a compound having a hydrophilic functional group which has a water solubility of 0.3 to 7 g/100 mL at 25°C, is coated on a support to form a polymeric film on the support, a hot air drying step in which the polymeric film is dried to the dry point by hot air, a steam drying step in which drying of the film is performed with steam, and a heating step in which heating is carried out at a temperature not lower than the sublimation temperature of the compound having a hydrophilic functional group.
  • the eleventh aspect as a compound having a hydrophilic functional group is added to the coating solution containing a polymeric compound having water vapor barrier properties, it is possible to let steam penetrate inside the polymeric film even in steam drying, so that drying can be accomplished quickly throughout the polymeric film, including the inside thereof, making it possible to raise drying speed. Further, as heating is carried out at a temperature not lower than the sublimation temperature of the compound having a hydrophilic functional group after removal of the organic solvent, it is possible to sublimate the compound to newly provide water vapor barrier properties to the polymeric film.
  • the coating solution contains at least a polymeric compound having water vapor barrier properties, an organic solvent and a compound having a hydrophilic functional group which has a water solubility of 0.3 to 7 g/100 mL at 25°C.
  • the polymeric compounds usable in the present invention are not subject to any specific restrictions except for the requirement that these compounds should have water vapor barrier properties.
  • examples of such compounds include fluoric resins such as polychlorotrifluoroethylene, polytetrafluoroethylene, polyvinylidene fluoride and polyvinyl fluoride; chloric resins such as polyvinyl chloride and polyvinylidene chloride; high-density polyethylene, low-density polyethylene, polyethylene chloride, polystyrene, polypropylene, polychloroprene, polyisobutylene, natural rubber, chlorinated natural rubber, polyethylene terephthalate, copolymers of these compounds, copolymers of these compounds and polyacrylonitrile, copolymers of these compounds and polyvinyl acetate, and copolymers of these compounds and polystyrene.
  • fluoric resins such as polychlorotrifluoroethylene, polytetrafluoroethylene, polyvin
  • chloric resins particularly polyvinyl chloride, polyvinylidene chloride, polytetrafluoroethylene, polychlorotrifluoroethylene, polyvinyl fluoride and polyvinylidene fluoride.
  • These polymeric compounds preferably have a moisture permeability in the range of 2.6 to 98 g(STP)cm/(cm 2 ⁇ s ⁇ cmHg). Defining the moisture permeability of the polymeric compounds in the above range is particularly effective as it produces an effect of lowering water vapor barrier properties when a compound having a hydrophilic functional group is added.
  • the more preferred range of moisture permeability of the polymeric compound is 2.6 to 48 g(STP)cm/(cm 2 ⁇ s ⁇ cmHg).
  • An organic solvent is contained in the coating solution for dissolving the polymeric compound and the compound having a hydrophilic functional group which is described later. It is possible to use any type of organic solvent which is capable of dissolving the polymeric compound and the compound having a hydrophilic functional group. In the following reference, temperatures in the parentheses are boiling point.
  • Examples of the solvents having a low boiling point which are usable in the present invention include alcohols such as methanol (64.5°C-64.65°C), ethanol (78.32°C), n-propanol (97.15°C), isopropanol (82.3°C), n-butanol (117.7°C) and isobutanol (107.9°C); ethers such as ethyl ether (34.6°C) and isopropyl ether (68.27°C); ketones such as acetone (56.2°C), methyl ethyl ketone (79.59°C), methyl-n-propyl ketone (103.3°C), methyl isobutyl ketone (115.9°C) and diethyl ketone (102.2°C); esters such as methyl acetate (57.8°C), ethyl acetate (77.1°C), n-propyl acetate (101.6°C) and n-
  • solvents having a high boiling point may include ⁇ -butyl lactone (204°C), acetamide (222°C), 1,3-dimethyl-2-imidazolidinone (225.5°C), N,N-dimethylformamide (153°C), tetramethyluric acid (175°C-177°C), nitrobenzene (211.3°C), formamide (210.5°C), N-methylpyrrolidone (202°C), N,N-dimethylacetamide (166°C), dimethyl sulfoxide (189°C) and the like.
  • the present invention it is possible to conduct steam drying efficiently by reducing the water vapor barrier properties of the polymeric film, so that drying can be accomplished quickly and particularly suitably even when the film contains a solvent having a boiling point of 150°C or higher.
  • a compound having a hydrophilic functional group is added for improving steam permeability of the polymeric film to be formed. As it is possible to let steam permeate inside the polymeric film by such improvement of steam permeability of the polymeric film, it is possible to raise drying speed in the steam drying step.
  • Addition of a compound having a hydrophilic functional group can be expected to increase steam permeability of the polymeric film to be formed.
  • high water solubility of the compound may adversely affect its compatibility with the polymeric compound, and drying of the film may cause precipitation of the compound having a hydrophilic functional group on the polymeric film, making it unable to derive the effect of improving steam permeability of the produced film. Therefore, the compound having a hydrophilic functional group needs to be one which is compatible with the polymeric compound used.
  • the compound having a hydrophilic functional group is preferably one whose water solubility at 25°C is not higher than 7 g/100 mL, preferably falls in the range of 0.3 to 7 g/100 mL.
  • water solubility of this compound exceeds the above range, this compound may prove incompatible with the polymer, causing precipitation of the compound having a hydrophilic functional group as drying advances, making it unable to derive the desired effect.
  • water solubility of the compound having a hydrophilic functional group is below the above range, the compound proves too low in water solubility to produce the desired effect.
  • hydrophilic functional groups of the compounds having hydrophilic functional groups may include carboxyl groups, carbonyl groups, ester groups, amide groups, hydroxyl groups, aldehyde groups, sulfo groups, amino groups, cyano groups, thiol groups, nitro groups and ether groups.
  • the compounds having a hydrophilic functional group may include fatty acids represented by the formula R-COOH (wherein R is H or a straight-chain fatty acid represented by the formula CH 3 (CH 2 ) n - (wherein 0 ⁇ n ⁇ 12) or its isomer) such as formic acid, acetic acid and propionic acid; aromatic carboxylic acids such as benzoic acid, phthalic acid, isophthalic acid, terephthalic acid, hemimellitic acid, trimellitic acid, trimesic acid, mellophanic acid, prehnitic acid, pyromellitic acid, diphenic acid, acetylsalicylic acid and benzilic acid; difatty acids such as oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, fumaric acid and phthalic acid; hydroxylic acids such as lactic acid, tartaric acid, hydroxybutyric acid and citric acid; amino acids such as alan
  • a compound having a hydrophilic functional group is contained in the coating solution preferably in an amount of 10 to 40 parts by mass, more preferably 10 to 20 parts by mass, per 100 parts by mass of the polymeric compound. No noticeable effect can be obtained if the content of this compound is less than the above-defined lower limit value. Also, no extra effect can be derived even if the compound is contained in an amount exceeding the upper limit value.
  • additives include surfactants for better coating, dyes, plasticizers for better film formation and hardening agents.
  • the supports usable in the present invention are not limited to the continuously movable strip-shaped supports; it is also possible to use metals, resins, paper, cloth and the like having other shapes.
  • Aluminum is preferably used as the support employed in the production of the polymeric film.
  • the aluminum sheet is made of a metal composed principally of aluminum which is dimensionally stable. Aluminum or an aluminum alloy is used therefor.
  • the aluminum sheet is not specifically defined in terms of composition, but it is most preferable to use a pure aluminum sheet. As it is difficult to obtain completely pure aluminum in view of its refining technology, there may be used an aluminum sheet containing a trace of an alien element or elements.
  • Thickness of the aluminum sheet is typically in the range of about 0.05 mm to about 1 mm, preferably 0.1 mm to 0.5 mm. Thickness of the sheet may be properly changed according to the size of the printer and printing plate as well as the user's requests.
  • a polymeric film producing system used for the method of drying polymeric film of the present invention is described below.
  • Fig. 1 is a block diagram illustrating schematically a polymeric film producing system 10.
  • arrow A indicates the direction in which the support (which may hereinafter be referred to as "web") 12 is conveyed.
  • the polymeric film producing system 10 shown in Fig. 1 comprises principally a feeding device 14 which feeds the web 12, a coating device 16 which applies a coating solution to the web, a hot air drying apparatus 18 in which the coated polymeric film is dried by hot air, a steam drying apparatus 20 in which a steam atmosphere is formed for drying the film, and a take-up device 22 for rolling up the web 12.
  • the polymeric film producing system 10 shown in Fig. 1 is an exemplification, and it may be substituted by other suitable systems.
  • the web 12 fed from the feeding device 14 is conveyed to pass through the respective steps under the guidance of guide rollers 27 and the like.
  • the coating device 16 is a device for applying a coating solution on the web 12 surface.
  • various coating methods such as, for instance, slide bead coating, curtain coating, bar coating, spin coating, spray coating, dip coating, air knife coating, blade coating and roll coating.
  • the coating method used in this invention is not defined to any specific type, but slide bead coating, curtain coating and bar coating are preferably used. Bar coating is employed in the system of Fig. 1 .
  • the hot air drying apparatus 18 and the steam drying apparatus 20 are the devices for drying the polymeric film formed on the web 12.
  • Organic solvents are contained in the coating solutions, so it is imperative to quickly evaporate away such organic solvents from the viewpoints of improvement of productivity and product quality and its maintenance.
  • the hot air drying apparatus 18 is equipped with a hot air drying chamber 24 formed along the web conveying direction, with both ends of this device forming the slit-like openings for passing the web 12.
  • the web 12 is conveyed by feed rollers 32 while supported at its underside.
  • In the hot air drying chamber 24 are disposed a plurality of nozzles 28 for blowing hot air against the web 12.
  • the hot air drying apparatus 18 is designed to blow hot air against the web 12 to thereby dry it.
  • the number of the nozzles 28 and their locations of installation can be properly selected, with Fig. 1 showing only an exemplification.
  • the hot air temperature is preferably set to fall within the range of 40 to 150°C. It is also preferable to set the average velocity of hot air at 8 m/S and the average air flow in the range of 1.9 ⁇ 10 2 to 11.9 ⁇ 10 2 m 3 /min.
  • Drying by the hot air drying apparatus 18 is conducted till reaching the dry point at which the polymeric film is solidified. This is for the reason that drying cannot be accelerated and the desired effect of drying cannot be obtained when steam drying is carried out in a state where the polymeric film is not yet solidified.
  • the "dry point" referred to in this specification means a point at which a state of drying is reached where there no longer takes place any change on the surface of the polymeric film on the web 12. It is possible to determine whether this drying point has been reached or not by, for instance, rubbing the surface of the polymeric film with a stick having a cloth coiled at an end and observing whether the coating solution adheres to the cloth attached to the stick end.
  • the dry point is described here more specifically.
  • the film surface temperature which remained at the wet-bulb temperature begins to rise up at a certain time point.
  • the period before the film surface temperature begins to rise up is called efficient drying period, and during the period of wet-bulb temperature, there remains a state where intra-film movement of the volatiles in the film is sufficiently swift and there still amply exists the solution which is volatilized from the film surface.
  • drying period The period after the rise of film surface temperature is called falling rate drying period.
  • this falling rate drying period a state is produced where the volatiles in the coated film become short on the film surface and the drying speed remains low even if the same air is blown.
  • drying changing point drying point
  • Solids ratio % solids content / volatiles content + solids content ⁇ 100 Solids content and (volatiles content + solids content) can be determined from measurements of weight.
  • the polymeric film which has been dried to the dry point by the hot air drying apparatus 18 is then conveyed into a steam drying apparatus 20.
  • This steam drying apparatus 20 is furnished with a steam drying chamber 26 in which a plurality of nozzles 30 for spouting steam to the web 12 are disposed.
  • a steam atmosphere can be formed in the steam drying chamber 26 and heated to remove the organic solvent contained in the coating solution applied on the web 12.
  • Temperature of the steam atmosphere in the steam drying chamber 26 is preferably set lower than sublimation temperature of the compound having a hydrophilic functional group.
  • the steam atmosphere temperature is preferably set to remain in the range of 40 to 150°C. It is more preferable to use overheated steam of 100°C or higher.
  • Duration of the steam drying step is set at 0.5 seconds or longer for attaining the effect of the present invention. No specific upper limit is set on the duration of this step; a satisfactory effect can be obtained by conducting this step for 2 seconds.
  • the web 12 dried by the steam drying apparatus 20 is finally rolled up by the take-up device 22.
  • Fig. 2 is a block diagram illustrating schematically another embodiment of the polymeric film producing system.
  • the polymeric film producing system 110 shown in Fig. 2 differs from the polymeric film producing system 10 of Fig. 1 in that a second steam drying apparatus 132 is provided next to the steam drying apparatus 20.
  • a second steam drying apparatus 132 is provided next to the steam drying apparatus 20.
  • the same parts and the parts having the same functions as in the system of Fig. 1 are given the same reference numerals, and the detailed explanation of these parts is omitted.
  • the second steam drying apparatus 132 is provided with a second steam drying chamber 134 in which a plurality of nozzles 136 for ejecting steam are disposed. This makes it possible to form a steam atmosphere in the second steam drying chamber 134 as in the steam drying apparatus 20.
  • Temperature of the steam atmosphere in the second steam drying chamber 134 is preferably set to be not lower than the sublimation temperature of the compound having a hydrophilic functional group.
  • the temperature of steam atmosphere in the steam drying chamber 26 be set to be not higher than the sublimation temperature of the compound having a hydrophilic functional group.
  • a step for heating by providing a second steam drying apparatus 132 was explained.
  • any appropriate method may be employed as far as it is capable of heating the steam atmosphere to or above the sublimation temperature of the compound having a hydrophilic functional group.
  • a method comprising blowing of hot air or a method of heating by hot rolls may be used.
  • Drying of the polymeric films was carried out with or without steam drying and by changing the amount of the compound having a hydrophilic functional group contained in the coating solution for forming the polymeric films.
  • the polymeric films were formed by using the following materials.
  • Compound having a hydrophilic functional group
  • Acetylsalicylic acid used in an amount of 10 to 40% by mass based on the polymeric compound.
  • the coating solution was applied by bar coating. Drying was conducted at 120°C for hot air drying and at 120°C and a steam rate of 350 g/m 3 (31.5% Rh (relative humidity)) for steam drying.
  • Each sample of polymeric film after drying was cut into 3 pieces, 10 mm in diameter, along with the aluminum web, and these pieces of sample were put into and sealed in a vial.
  • This vial was placed in a head spacer (Tekmar 7000HT, GL Sciences Inc.) connected to a gas chromatograph (GC390B, GL Sciences Inc.). Heating of the vial in the head spacer was practiced at 180°C for 5 minutes.
  • the gas chromatograph was operated using a packed column (Silicone DC-550, GL Sciences Inc.) at an oven temperature of 180°C and an FID temperature of 180°C.
  • the residual solvent vapor volatilized in the vial was automatically supplied through the head spacer into the gas chromatograph, and the concentration of the solvent remaining in the polymeric film was calculated from the determined peak area and calibration curves of ⁇ -butyrolactone.
  • the amount incorporated of a compound having a hydrophilic functional group drying scarcely advanced in steam drying in Comparative Examples 1 and 2 where no compound having a hydrophilic functional group was contained, whereas a reduction of the amount of residual ⁇ -butyrolactone was seen in Example 1 where a compound having a hydrophilic functional group was added in an amount of 10% by mass.
  • the amount of this compound was 40% by mass, the produced effect was substantially the same as obtained when the amount of the compound added was 30% by mass, indicating an inception of saturation of effect at this point. It was thus confirmed that the amount of a compound having a hydrophilic functional group is preferably within the range of 10 to 40% by mass based on the polymeric compound.
  • Polymeric films were made by varying the compound having a hydrophilic functional group and drying of the films was carried out.
  • Drying was carried out in the same method as in Test Example 1 except that benzoic acid, acetylsalicylic acid, fumaric acid, adipic acid, succinic acid and malonic were used as the compounds having a hydrophilic functional group which differed in water solubility (rate of dissolution in 100 mL of water at 25°C), in an amount of 40% by mass based on the polymeric compound. Results are shown in Table 2.
  • Example 10 where the compound used was highest in water solubility, the drying rate by steam drying was substantially equal to that by hot air drying.
  • Comparative Examples 7 and 8 where malonic acid was used as the compound having a hydrophilic functional group, malonic acid was incompatible with the polymer and precipitated, producing no noticeable effect of steam drying.
  • Polymeric films were made by varying the polymeric compound in the coating solution and drying of the films was carried out.
  • Test Example 1 The polymeric compound used in Test Example 1 was replaced by polystyrene, polyvinyl chloride, polyvinylidene chloride and polytetrafluoroethylene.
  • the same method as in Test Example 1 was also used for drying.
  • Moisture permeability of the polymer was evaluated on four samples of each film by the cylinder plate method (JIS Z0208), and the mean value of measurements on four samples was shown here. Results are shown in Table 3.
  • Acetylsalicylic acid was added in an amount of 40% by mass based on the polymeric compound.
  • the same materials as employed in Example 1 were used for the coating solution and the support.
  • the coating solution was applied by bar coating. Drying was carried out at 120°C for hot air drying, at 120°C and a steam rate of 350 g/m 3 (31.5% Rh (relative humidity)) for initial steam drying, and at 140°C and 550 g/m 3 (28.3% Rh (relative humidity)) for second steam drying. In this drying operation, hot air drying was performed until reaching the dry point at which the film was solidified, and after reaching the dry point, drying was conducted at a steam temperature not higher than the decomposition temperature of the additive for a period shown in Table 4 below, after which drying was further performed at a steam temperature not lower than the decomposition temperature of the additive.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Microbiology (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Textile Engineering (AREA)
  • Drying Of Solid Materials (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
EP10158387.0A 2009-03-31 2010-03-30 Procédé de séchage de film polymère et procédé de fabrication d'un film polymère barrière à la vapeur d'eau Withdrawn EP2236965A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009087845A JP5173912B2 (ja) 2009-03-31 2009-03-31 高分子膜の乾燥方法および水蒸気バリア性高分子膜の製造方法

Publications (2)

Publication Number Publication Date
EP2236965A2 true EP2236965A2 (fr) 2010-10-06
EP2236965A3 EP2236965A3 (fr) 2015-12-09

Family

ID=42306659

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10158387.0A Withdrawn EP2236965A3 (fr) 2009-03-31 2010-03-30 Procédé de séchage de film polymère et procédé de fabrication d'un film polymère barrière à la vapeur d'eau

Country Status (4)

Country Link
US (1) US20100247776A1 (fr)
EP (1) EP2236965A3 (fr)
JP (1) JP5173912B2 (fr)
CN (1) CN101852535A (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5614823B2 (ja) * 2011-08-12 2014-10-29 日本たばこ産業株式会社 乾燥装置及びこれを用いたシガレット巻紙の製造機
CN102502017A (zh) * 2011-09-30 2012-06-20 山东碧海包装材料有限公司 一种灌装机的双氧水挤水烘干系统
JP2015092619A (ja) * 2015-01-08 2015-05-14 東京エレクトロン株式会社 基板乾燥方法及び基板処理装置
JP6356207B2 (ja) * 2016-12-15 2018-07-11 東京エレクトロン株式会社 基板乾燥方法及び基板処理装置
JP6325067B2 (ja) * 2016-12-15 2018-05-16 東京エレクトロン株式会社 基板乾燥方法及び基板処理装置
CN111685175A (zh) * 2020-05-28 2020-09-22 珠海格力电器股份有限公司 保鲜装置、冷藏设备
CN116041677A (zh) * 2022-12-22 2023-05-02 广东珠江化工涂料有限公司 一种减少水性醇酸树脂合成过程中升华物固废的方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4092593B2 (ja) 2006-05-18 2008-05-28 富士フイルム株式会社 被乾燥物の乾燥方法及び装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2797781B1 (fr) * 1999-08-27 2002-11-08 Patrick Duhaut Procede de sechage par membrane semi-permeable
JP2004292793A (ja) * 2003-03-13 2004-10-21 Jsr Corp フィルムまたはシートの処理方法
JP4527509B2 (ja) * 2003-12-26 2010-08-18 岡本化学工業株式会社 平版印刷版用アルミニウム支持体および平版印刷版用原版
JP3963472B2 (ja) * 2006-11-28 2007-08-22 独立行政法人科学技術振興機構 ペプチド脂質化合物
JP4786580B2 (ja) * 2007-03-29 2011-10-05 富士フイルム株式会社 ポジ型感光性平版印刷版の製造方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4092593B2 (ja) 2006-05-18 2008-05-28 富士フイルム株式会社 被乾燥物の乾燥方法及び装置

Also Published As

Publication number Publication date
JP2010236841A (ja) 2010-10-21
JP5173912B2 (ja) 2013-04-03
US20100247776A1 (en) 2010-09-30
CN101852535A (zh) 2010-10-06
EP2236965A3 (fr) 2015-12-09

Similar Documents

Publication Publication Date Title
EP2236965A2 (fr) Procédé de séchage de film polymère et procédé de fabrication d'un film polymère barrière à la vapeur d'eau
CA2916439C (fr) Procede de production de membranes a base de polyimide
US20120050433A1 (en) Image recording apparatus
CA2570087A1 (fr) Membrane pour filtration d'eau a fibres creuses poreuse en resine de fluorure de vinylidene et procede pour la produire
JP2011200863A (ja) 高められた加水分解安定性を有するポリアミド膜
US20100040789A1 (en) Porous film production method
TWI490273B (zh) 二軸延伸聚醯胺樹脂膜及其製造方法
US20090232982A1 (en) Porous film production method and apparatus
US4774038A (en) Polyamide membranes
US7410065B2 (en) Membrane for the separation of material mixtures and method for production thereof
US10029217B2 (en) Methods of making crosslinked membranes utilizing an inert gas atmosphere
US20090127736A1 (en) Solution casting method and solution casting apparatus
JP3893862B2 (ja) セルロースエステルフィルムの製造方法及びセルロースエステルフィルム
TWI383013B (zh) 用於製造聚乙烯醇薄膜的方法
JP2011509849A (ja) インクジェットプリンターおよびインクジェット印刷プロセス
JP2007260570A (ja) 塗布膜の乾燥方法及び平版印刷版の製造方法
JP2010082986A (ja) フィルム延伸設備及び延伸方法
US20180001269A1 (en) Metallopolyimide precursor fibers for aging-resistant carbon molecular sieve hollow fiber membranes with enhanced selectivity
US20220332962A1 (en) Polymer layers by reactive printing
JP4903072B2 (ja) セルロースエステル微細多孔質膜の製造方法および製造装置
US10183258B2 (en) Metallopolyimide precursor fibers for aging-resistant carbon molecular sieve hollow fiber membranes with enhanced selectivity
US10143973B2 (en) Metallopolyimide precursor fibers for aging-resistant carbon molecular sieve hollow fiber membranes with enhanced selectivity
US10112149B2 (en) Metallopolyimide precursor fibers for aging-resistant carbon molecular sieve hollow fiber membranes with enhanced selectivity
JP2009214388A (ja) 溶液製膜方法
US20160354730A1 (en) Method for the production of poly(meth)acrylonitrile-based polymer membranes, polymer membranes, and also solutions for the production of a polymer membrane

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

AX Request for extension of the european patent

Extension state: AL BA ME RS

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

AX Request for extension of the european patent

Extension state: AL BA ME RS

RIC1 Information provided on ipc code assigned before grant

Ipc: F26B 13/10 20060101ALI20151105BHEP

Ipc: F26B 3/02 20060101AFI20151105BHEP

17P Request for examination filed

Effective date: 20160429

RBV Designated contracting states (corrected)

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20161122

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20170404